Don't bother downloading pPod, an audio guide to London's toilets from the Nykris Agency.
If you're hoping for something useful or clever, you'll be disappointed: it's simply voice recordings of some intern's first impressions of several bogs in central London. And a couple of water-themed tunes, such as Handel's Water Music.
It would have been far more useful to include an MP3 of running water. I know several people who can't pee in public unless a faucet is running. For some, the sound of a rustling plastic shopping bag also does the job.